Progress on Researches of Soil Potassium Forms and Effectiveness

The soil potassium forms,effectiveness of different forms of potassium,transformation of potassium in the soil and the influence of different tillage methods on soil potassium were briefly summarized in the paper. It was pointed out that the conversion rate between different forms of potassium was the main factor affecting the availability of soil potassium. In the future,the transformation of soil potassium dynamics under different farming methods and the influence of farming practices on soil potassium fixation and mechanism research should be strengthened.